题解 | #密码验证合格程序#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) {
            check(in.nextLine());
        }

    }

    public static void check(String str) {
        int[] toAbove = {0, 0, 0, 0};
        boolean isLength = false;//长度是否超8位
        boolean isAbove3 =
            false;//是否三种以上数字（字母大写，字母小写，特殊字符，数字）
        boolean isRepeat6 = false;//重复的字符串和<6;
        int repeat = 0;
        if (str.length() > 8) {
            isLength = true;
        }
        for (int i = 0; i < str.length(); i++) {
            char ch = str.charAt(i);
            if (ch > 64 &&
                    ch < 91) { //大写；65-90  ASCII小写：97-122//数字0-9 48——57；space 32
                toAbove[0] = 1;
            } else if (ch > 96 && ch < 123) {
                toAbove[1] = 1;
            } else if (ch - '0' < 10 && ch - '0' > -1) {
                toAbove[2] = 1;
            } else if (ch != 32) {
                toAbove[3] = 1;
            }
            int sum = toAbove[0] + toAbove[1] + toAbove[2] + toAbove[3];
            if (sum >= 3)
                isAbove3 = true;

        }
        isRepeat6=isOver3ReaptNoSet(str);
       
        if (isAbove3 && isLength && !isRepeat6) {
            System.out.println("OK");
        } else {
            System.out.println("NG");
        }
        isAbove3 = false;
        isLength = false;
        isRepeat6 = false;


         
    }


    public static boolean isOver3ReaptNoSet(String str) {//好像不能使用hashset，太坑了

        for (int i = 0; i < str.length() - 3; i++) {
            String subStr = str.substring(i, i + 3); //aaaa
            for (int j = i + 1; j < str.length() - 3; j++) {
                String subStr1 = str.substring(j, j + 3);
                if (subStr.equals(subStr1)) {
                    return true;
                }

            }

        }
        return false;
    }



}